Steam ejector, secondary steam from condensate water
Thread Content
A certain manual discusses the use of steam ejectors to recover secondary steam from condensate; I wonder if anyone in this forum has tried to do this. Could you introduce the usage? ? ? Thank you very much
We haven’t used it; we just reused the boiler system!
You can use flash steam and steam condensate in combination with superheated steam via a steam ejector. There is such a usage device.
Jet pumps use high-grade steam to recover the low-quality secondary steam generated; the calculation method should be described in the principles of chemical engineering.
Let me introduce you to the processes used in our factory. For the sugar liquefaction step prior to the fermentation process, we employ a steam-jet cooking method for the slurry; direct steam is mixed with the slurry using a injector, and then it enters the liquefaction system through the cooking tank. Before entering the liquefaction system, we use a vacuum flash evaporation system to generate secondary steam; the vacuum level does not need to be very high – around -0.03 to -0.04 MPa. This value is determined based on factors such as the flow rate of the material. The secondary steam thus produced is used for the preliminary preheating of the slurry, while the condensed water is returned to the boiler, thereby allowing us to reduce the consumption of direct steam. That’s all; I hope it helps you.
You mentioned Hou Hui’s book; later, another book was published (by Xi’an Jiaotong University), and his work was used as an example in it. His true application of theory is Sokolov. My original design approach also relied on thermal methods; however, it was later found that these methods, by ignoring the state of mixing within the process, can easily push the equipment to its limits (this was evident during the secondary compression stage). So, if one aims for the extreme coefficient, it can be used as a reference. If combined with gas dynamics for restriction, good results will be achieved; the equipment operation parameters I have provided to the manufacturer already demonstrate this.